Two-cycle gas-engine.



No. 730,345. v PATENTED JUNE 9, 1903.

- A. M. 003mm TWO CYCLE GAS ENGINE...

APPLIUATION FILED JUHE;18, 1901- no 1101121. s sums-sum 1.

No. 730,345. 'EATENTED JUNE 9,1903.

'- A. M. GOBURN.

TWO cYcLE As ENGINE.

urmouzon FILED JUNE 18, 1901.

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UNITED. STATES Patented June 9, 1903.

PATENT O FICE.

TWO-CYQLE GAS-ENGINE,

srnorrrcn'rron forming part of Letters Patent No: 730,345, dated June 9,1903. Application filed re s, 1901. Serial No. 65,05 5. (No model.)

To all whom, it may con/own.-

Be it known that I, Avon MENZoR 003mm,; a citizen of the United States,residing at Daunt, in the county of Tulare and State of California, haveinvented anew and'us'eful Two-Cycle Gas-Engi'ne, of which the followingis a specification.

This invention relates to engines Operated by gases generated byexplosion within "the cylinders; and it consists in the construction,combination, and arrangement of 'parts, as hereinafter shown anddescribed, and'specifically'pointed out in the claims.

In the drawings illustrative of theinvention, Figure 1 is a longitudinalsectional elevation. Fig. 2 is a plan view in transverse section. Fig. 3is a transverse section on the line a a of Fig. 1. Fig. 4 is atransverse section on the line Z) Z of Fig. 1. Fig. 5 is a perspectiveview of one of the cylinder-heads detached.

The framework and outer casing are'in one piece of tubing 1, bored trueto a gage, and adapted'to receive two cylinders 2 3, one in,

each end, the cylinders each having laterally.- projecting flanges 4 5,abutting against the ends of the tubular frame, as shown. The cylinderswill be turned to correspond to but a trifle larger than the boreof thetube,-so that the latter may be shrunk. upon the cyli'nders by expandingthe shell'or .casin g by heat and then inserting the cylinders andallowin g the shell to contract by'cooling, and thus form a very closeunion between them. The cylinders are closed at their outer ends byheads v 6 7, the heads being hollow, as at 8 0, and

bolted to the flanges d'and 5. The inner ends of cylinders are open, asshown, and the space 10 within the combined tubular casing and framebetween the cylinders forms the crank- ,chamber and'also the chamberinto which the explosive mixture of gas and air is drawn through alightcheck-valve 45 by the outward motion of the pistons and which is thencompressed in said chamber upon the return stroke of the pistonssimultaneously toward frame 1, as shown.

tively, .iyi-ththe hollow spaces 8 9 in the cylinder-headsfi and 7 bysmall apertures 16, so that a free circulation of the water will bepermitted between the water-spaces.

17 18 are longitudinal channels or ducts 'formed'in the exterior of thecylinders 2and 3, leading from the inner ribs 13 let and connected withports 19 20, the ports and channels forming connections between thechamber 10 and the cylinders 2 and 3. The inner portions of thecylinders 2 3 are cut away, as at 11 12 to lighten the cylinders, eachof the cylinders at these points supported by ribs 11 12", as shown. Atpoints opposite the ports 19 20 are located the exhaust-ports 2122,0pening into the outer air through the sides of the cylinders and thecasing 1.

23 24 are the pistons, which are of the trunk pattern and each providedwith a transverse stud 25 26 to afford means for the reception of oneend of connecting-rods 27 28, the other ends of the rods being coupledto reversed cranks 29 30 on a main driven'shaft 31, properly mountedthrough the casing or By this means the pistons being movedsimultaneously to and from the crank-shaft serve to revolve ii. Projecting-outwardly from the closed ends of each piston are plates 33 todeflect the entering charge of explosive mixture in the usual man nertoward the top of cylinder.

Arranged to cover and uncover the entrances to the channels 17 and 18are valves 34: 35, each with a valve-rod 36 37, passing outward throughstuffing-boxes 38 39 in the easing 1 and provided with bell-crank levers40 n, each of the bell-cranks connected by a rod 42 by their upper ends,.so that'motion imparted to the rod will simultaneously move the valves34: 35, and .thus simultaneously cover or uncover the entrance to thechainbers 17 19. The rod 42 maybe connected by hand to govern the amountof explosive mixture entering the cylinders, and thus regulate the speedof the engine, or it may be attached to a suitable governor driven bythe engine.

Each of the helical.

In case either cylinder should be disabled the engine may still be runby disconnecting rod 42 and throttling the disabled. cylinder by meansof either valve 34 or 35.

Disposed centrally through the cylinderheads are the jump spark-plugs 4344 of the usual construction and so connected and.

arranged that by connecting a secondary terminal from a Ruhmkorff coilto each plug simultaneous sparks occur in the cylinders by the use ofbut one coil, electrical connection being made between the plugs by theengine itself or when plugs are used having both electrodes insulatedmay be made by a wire from one plug to the other.

The air and the gas forming the explosive mixture are introduced intothe chamber 10 through check-valve 45 in the casing 1.

Supporting-bands 46 47 will be clamped around the casingl at the endsand each band provided with projections 48 49 to afiord means forsupporting the engine upon a suitable base or bed frame 49, which neednot be heavy nor solid, as the reciprocating parts balance each other,and the explosions being produced simultaneously, thereby prevent anyshock,especially when on the center, as a shock in one cylinder onlywhen the pistons are both at the outer ends of the stroke is a seriousmatter, subjecting all the parts to severe strains and frequentlycausing breakage of the parts. By exploding the gas in both cylinders atonce, however, this objection is avoided. By forming the outside casingof a single tube and shrinking it upon the cylinders a very light,compact, and strong structure is produced, especially suitable forautomobile or launch use.

The helical arrangement of the water-chambers around the cylinders is animportant feature of my invention, as it provides for a continuous flowof water through the waterchamber and insures a free, rapid, and 0011-stant circulation throughout all the waterchambers.

* What I claim as new is'- 1. In a gas-engine, the combination of thetwo oppositely-disposed open-ended cylinders having helical flanges orribs to form waterchambers and provided with peripherallydisposedgas-passages leading from a central compression-chamber to theexplosion-chambers, a casingiformed of a single length of metallictubing having its opposite end portions shrunk upon the peripheries ofthe cylinders and forming the said central compression-chamber at apoint between the two cylinders, the casing forming one wall of thegaspassages and one wall of all of the waterchambers on the peripheriesof said cylinders, trunk-pistons in said cylinders, a crank shaft, andconnectingrods extending between the pistons and the crank-shaft.

2. The combination in a gas-engine, of a pair of oppositely-facingcylinders, each provided with peripherally disposed ribs arranged toform waterjackets and gas-passages, a casing formed of a single lengthof metallic tubing shrunk tightly on all of said ribs and forming onewall of the water-jackets and gas-passages, the central portion of thetube forming a gas-compression chamber, valves arranged between thecompression-chamber and the two cylinders to regulate the quantity ofexplosive mixture supplied to the cylinders, trunk-pistons in saidcylinders, a cranked shaft, and connecting-rods extendin g between saidcranked shaft and the trunkpistons.

3. The combination in a gasengine, of the oppositely-facing cylinders 2,3, having helical ribs 13, 14 to form water-chambers and provided withlongitudinally-disposed gaspassages 17 and 18 respectively incommunication with cylinder-ports, a casing 1 formed of a single pieceof metallic tubing shrunk on the ribbed and channeled cylinders andforming one wall of the water-chambers and gas-passages, the centralportions of said tube forming a gas-compression chamber in communicationwith thegas-passages, valves Si and 35 for controlling a supply of gasfrom the compression-chamber to the passages 17 and 18 respectively,crank-shaft bearings supported by the tubular casing, a crank-shaftadapted to said bearings, pistons disposed within the cylinders andconnected to said crank shaft, and exhaust ports leading through thewalls of the cylinders and the casing, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

AVON MENZOR OOBURN.

